EP0762779A3 - Luminance signal producing circuits - Google Patents

Luminance signal producing circuits Download PDF

Info

Publication number
EP0762779A3
EP0762779A3 EP96306560A EP96306560A EP0762779A3 EP 0762779 A3 EP0762779 A3 EP 0762779A3 EP 96306560 A EP96306560 A EP 96306560A EP 96306560 A EP96306560 A EP 96306560A EP 0762779 A3 EP0762779 A3 EP 0762779A3
Authority
EP
European Patent Office
Prior art keywords
signal
luminance signal
signals
low frequency
frequency compensation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96306560A
Other languages
German (de)
French (fr)
Other versions
EP0762779A2 (en
Inventor
Kazuhiko c/o Sony Corp. Nishiwaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of EP0762779A2 publication Critical patent/EP0762779A2/en
Publication of EP0762779A3 publication Critical patent/EP0762779A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/72—Combination of two or more compensation controls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/10—Circuitry of solid-state image sensors [SSIS]; Control thereof for transforming different wavelengths into image signals
    • H04N25/11—Arrangement of colour filter arrays [CFA]; Filter mosaics
    • H04N25/13—Arrangement of colour filter arrays [CFA]; Filter mosaics characterised by the spectral characteristics of the filter elements
    • H04N25/134—Arrangement of colour filter arrays [CFA]; Filter mosaics characterised by the spectral characteristics of the filter elements based on three different wavelength filter elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Color Television Image Signal Generators (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

A luminance signal producing circuit comprises a signal input portion to which an image pickup signal is supplied from a solid-state image sensor (11) provided with a color filter array (FA) comprising a plurality of color filter units arrayed in the manner of a checkered green-line sequential red and blue arrangement, a wide band luminance signal generator (24), a low frequency compensation luminance signal generator (21) and a signal synthesizer (73) for synthesizing with each other a wide band luminance signal and a low frequency compensation luminance signal based on the image pickup signal obtained respectively from the wide band luminance signal generator and the low frequency compensation luminance signal generator to produce a luminance signal (DY). The low frequency compensation luminance signal generator (21) is operative to produce a first signal in which a vertical carrier signal component is cancelled and a second signal in which a horizontal carrier signal component is cancelled, then operative to extract one of the first and second signals having a smaller absolute value when the first and second signals have the same polarity and none of the first and second signals or a signal corresponding to an average to the first and second signals when the first and second signals have respective polarities different from each other so as to have an extracted signal, and further operative to supply a horizontal low pass filter (71) with the extracted signal to obtain the low frequency compensation luminance signal from the horizontal low pass filter.
EP96306560A 1995-09-11 1996-09-10 Luminance signal producing circuits Withdrawn EP0762779A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP232163/95 1995-09-11
JP7232163A JPH0984028A (en) 1995-09-11 1995-09-11 Luminance signal generating circuit

Publications (2)

Publication Number Publication Date
EP0762779A2 EP0762779A2 (en) 1997-03-12
EP0762779A3 true EP0762779A3 (en) 1998-12-30

Family

ID=16934989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96306560A Withdrawn EP0762779A3 (en) 1995-09-11 1996-09-10 Luminance signal producing circuits

Country Status (6)

Country Link
US (1) US5945977A (en)
EP (1) EP0762779A3 (en)
JP (1) JPH0984028A (en)
KR (1) KR970019699A (en)
CN (1) CN1077758C (en)
TW (1) TW398156B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6346999B1 (en) * 1997-02-14 2002-02-12 Canon Kabushiki Kaisha Image pickup apparatus
US6181883B1 (en) * 1997-06-20 2001-01-30 Picostar, Llc Dual purpose camera for VSC with conventional film and digital image capture modules
JP2006319460A (en) * 2005-05-10 2006-11-24 Matsushita Electric Ind Co Ltd Luminance signal processor
TWI293543B (en) * 2005-12-07 2008-02-11 Ind Tech Res Inst Illumination brightness and color control system and method thereof
AU2008204560A1 (en) * 2007-01-10 2008-07-17 Tomtom International B.V. Data processing method & device
CN111028768A (en) * 2019-12-27 2020-04-17 北京集创北方科技股份有限公司 Signal generating device, driving chip, display system and driving method of LED display

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0508607A2 (en) * 1991-03-13 1992-10-14 Canon Kabushiki Kaisha Electronic still camera

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444424A (en) * 1977-09-14 1979-04-07 Sony Corp Solid state pick up unit
JPS5997291A (en) * 1982-11-26 1984-06-05 Canon Inc Image pickup device
EP0113462B1 (en) * 1982-12-14 1990-08-16 Matsushita Electric Industrial Co., Ltd. Solid state color imaging apparatus
DE3619663C2 (en) * 1986-06-11 1994-08-25 Broadcast Television Syst Method and arrangement for correcting a luninance signal
US5283634A (en) * 1987-06-18 1994-02-01 Canon Kabushiki Kaisha Luminance signal correcting method
US5267028A (en) * 1988-08-26 1993-11-30 Canon Kabushiki Kaisha Solid state image pickup apparatus having luminance control
JP3528184B2 (en) * 1991-10-31 2004-05-17 ソニー株式会社 Image signal luminance correction apparatus and luminance correction method
US5548330A (en) * 1992-12-24 1996-08-20 Canon Kabushiki Kaisha Image pickup device for generating a corrected luminance signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0508607A2 (en) * 1991-03-13 1992-10-14 Canon Kabushiki Kaisha Electronic still camera

Also Published As

Publication number Publication date
US5945977A (en) 1999-08-31
CN1077758C (en) 2002-01-09
EP0762779A2 (en) 1997-03-12
TW398156B (en) 2000-07-11
KR970019699A (en) 1997-04-30
CN1150365A (en) 1997-05-21
JPH0984028A (en) 1997-03-28

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